Electric signal system.



F. B. WOOD.

ELBOI'IIU INILL BIETEN.

unxouxol man :un a, 1m.

Pmwnw Jam. 81', 1911;

WWW WM ATTORNEY i E'. n. wom. BLEOI'IIO SIGNAL BIETEN. APILIOA'IMI IILID JULY I, INI.

Pimm Jam. s1. 1911.

I llIlTI-llll? I. v

WA 770W 8.

ATTURNEY Il (l UN REED STATES PATENT OFFICE.

FRANK B. WOOD, F NEW YOBIL. N. Y.

ELECTRIC SIGNAL BYSTEEI.

pcciflcctlon o! Letters Invent.

Patented Jim. 3l, 191 l.

Application filed July 0, 1900. Serial No. 441,971.

To all whom 'it muy concern.'

it known that l, Fama E. "i'oon, a citizen of the United States, and a resident of the city. county. and State of New iiork, United States oi' America, have invented certain new and useful improvements 1n Electric Signal Systems, of which thc following is a s cit'ication.

My invention relates to improvements in electric signal systems such as are commonly uscd for tire alarm, telegraph, or police signal service, and its object ifi to improve upon apparatus and circuits used in auch systems ami to procida a simple apparatus und connecting circuits by ineami of which an cicient and reliable service may be attained.

'lo these ends my invention resides in the construction and arrangement. of parts described in the followin specification, the novel features of whici are set forth in claims.

Referring to the drawings, Figure 1 iu n diagrammatic representation of my invention. In this figure the receiving apparatus, such as may bc installed in a central station, is shown electrically connected with n fire alarm box and an auxiliary the station, and with a police call station. Fig. 2 is a diagram of circuits and certain parts of the apparatus with only so much of thc latter shown as is necessary to illustrate the operation of my invention.

Like characters of roferenco designato corrcaponding parte iu both of thc tignrcs.

lt) designata thc cnsin of a tire alarm box within which a nu-Ialllic frainell is located, which, ucar its nppcr portion pivotally supports a spur-gear 12, from the face of which a series of pins 12^ project. The gear l2 is arranged to be driven by u coiled spring lil.

H is u pinion in mcs-Ii with thc gear l2 and carries an urni Il` which in arranged to rotate with thc inion for u purpose which will appear hereinafter. 15, mounted upon the .same arbor with the pinion 1i. iu arranged to tranuinit ntohon to udbthcr pinion not shown which is rigidly mounted `upon an arbor tti. v A gear-wheel 1T, also mounted upon the arbor lt, actnates y an eacapenienti wheel 1S and an escapenient hitch lit. A signal disk is also :wcurcd to the arbor l0.' An insulated contact finger 21, eonctin v with this disk. is arranged to malte and realt an electric circuit.ia the usual manner whenever thc disk is rotated.

.\nothcr spur-gear4 of solenoid 30.

In the drawings, the disk arid finger are arranged for a closed circuit system, und thc signal number for which they are constructed is 43. The parts above dcecribcd arc normally hold from rotation'bv meana of a finger 2i. which is atiixed to tite arbor 16 and which rests upon a pin 28 pro'ecting from the lowercnd of u lever 24 w ich is pivoted at in the frame 11. An arm 26, which is an integral part of lever 25, extends above and to the right of this pivot und terminates in a hook or shoulder 27 which is adjacent. to the path of movement. of the pins 1.!^. The lower end of lever Q4 is malle with a lateral projection 28.

designate's'an unlocking solenoid supported upon the fraaie 11. To the lowei` end of its core 31 is a vhorizontal -arm 82 which normally rests against thc latter projection 28 on the lower end of lever 24 in auch a way as to hold the pin in the path 'of the arm 2:2 and thus maintain the mechanism at rest. The winding of solenoid 30 is included in a normallr open circuit under control of a lswitch which comprises` n movablc contact inaulated from but mounted upon the side of n switch-arm which is piroted at 4| and which is arranged to be moved into Huch u position mi to lnitbe two stationary contacts 2H und 3.1. 'iic pirated switch-arni 40 is also provided with u depending contact finger :iti which is ai'- rangcd to bc moved orcrstationary nntilated contact plates 37, 3H and 3i.

4:.' isa push-rod projcctiu.;r thronc'h the side of tho box l0 and spring-pressoiroutward. liy mcans'loi' this pushdvd thc pirated arm 40 may bc manually shifted to cause the contact plate 33 to bridge contacts 34 and 35 and at the same time more the contact linger .'lt' into such a position that it will Inid rc contacts l and 3H. circuit unplplict by n battery llt) at. the central station will hccloscd thereby through the winding 'lhe encrgizution of this solenoid will canse it to raise its core 31 and to more the arm 32 out of engagement with thc `houlder lci'cr :24 so that :i spring` 2t) which is in on- ;:ngemcnt with the lover will pnsli it over until the piu 23 is removed from thc )ath of movement of the arm 22. The sign lucchuaism aborc described is unlocked thereby and rotated by the spring 18' so that the make and break dcvicesnrill transmit the desired signal to the central ndice over a cir- 28 on the pivoted releasing,

l llt) iid cuit which l will .specifically point out hereinafter. lever will ciiuse its end 2T to be. inovd into the path of rnovement of the pins 1.2^ on the wheel 1Q.

'llie otury signal inecliunisin in no errlngedihnt ufter the signal dish 20 hns conipleted four revolutions, the iirni lt^ will enga with an inclined shoulder tt on switc -iirm 40 and will return this iirin to its normal ioeition, thus breaking the circuit througi solenoid 30 and bringing the contact. finger 36 to its originel `position to bridge libitioniiry contncts 38 un 3 This will at the sinne time euuse the core 31 und its connected parts to drop back into lockition to prevent further rotation of the signal disk.

In connection with theinnnual operation above described, it is often desirable to use in conjunction with such s ignnlbox one or more auxiliary stations such as 50, which may be electrically connected with the inaniter-box or station. The electricnl actuating meehiininm in the box 10 comprises ii nolendd 44 which` when energized, will pull down its cre 45, which is connected at 46 with the pivoted switch-erin 40. in such o manner thiit this downward movement of the core will shift the nwitchmrin t0 into the nme position and will cause it to perform the same functions as would be accomplished b iiiiinuiill pushing it. over by ineens of t e push- 42.

A buttery 51 is provided at the auxiliary station an this is connected by a wire 52 with the master-box. The mechanism in the nuiiliarv tation box comprises n wound-up spring (not shown), which is nrrnnged to rotate a disk 63, which disk is connected with the other terminal of the battery 51 by ii coiituct finger 54. The disk 53 is set in niotion whenever the locking lever 55 is pulled buck by the hook 50 out of engagement with the pin 5T upon the disk. -68 is u emituetfingcr adapted to engage with the periphery of the dink 53 when the latter is rotated, und this is 'eonl'iected through n. buzzer 59 b v u wire 58^ with one ot' the terminals ot the nwitchnrin iictunting .solenoid 44. notch-or depression 53'* in the disk 53. directly `below the contnct fiug'er 5R, leiires this circuit open at thin point.

60 designntc nn electi'onnigni-t which is nrranged to net upon und to pull over n le\ei 61 which is pivoted nt 62 iilitil thc upper end thereof is in the piitli'ot' niorcuieiit of the pin 57. t

dil'is ii liniiiiiier connected with the upper p'oitioii of lever til und udn lcd to l-trilie against u bell 64 whenever tie lever til is nulled bark by s ring 6.7.

When the dis 53 rotates, it closes a circuit from battery 5t, dish 53, contiict iiigel' 58, through buzzer 5t), 'conductor 58", j of' ii lnindle 73.

1 eccoci Ioolenoid -t-t, out through conductor il",

'lhe nioieiuenl of the unlocking,

which is uninet-ted nt. 44 with the sigiinl circuit 108 which is connected with the finger .l und through the signal disk 20 and tho wire 52 buck to the other'tcrininul of buttery fil. A second circuit in ulno closed in the auxiliary box as follows: From battery i'il, through contiict finger o8, conductor titi, winding of magnet. 60, iiud conductor 6T to the box 10. und through the solenoid 44 und signal disk 20 beck to buttery fit by conductor 52. If the circuiti, ure in proper order the muguet 44 will be energized and the buzzer 5t) will be put into uetion to indiente this fuct. The second circuit which go'cs through the niugnets 60 and 44- will continue "to energize theni until the signiil is sent in from the signal disk 2u in the master-box. If thc other circuits are in such condition iis to lock the signal nicchiinism within box 10 in'it manner which 1 will later describe, the u per end of pivotcd lever 6l engaging with tlie pin 57 will hold disk b3 from further rotation und thus hohl the two circuits of the auxilinry ntiitioii cloned until such time iis the i-iignnl is sent in by the mechanism within the box 10. When the signal circuit is interniitteiitl broken nt the signal disk 20, the signal wi l be repented within the nuxiliury box because thc muguet. 00 will be intermittently denergized und will thus nllow the spring 05 to pull the hummer (33 over s minst the bell 64, und this.

will also stop the uzzer intermittently. As soon as the circuit. through the magnet 60 is first broken, it will allow the disk 53 to complete itii rotation until the pin 5T is nguin engngeil by the locking lever 55. The uetuuting ineehiiiiiiini which I have not shown, im' it is well underiitood und torinii no part of the present invention, should be so uri'unged thut the rotation of the disk 53 should not he completed in less time thiiii it tultes for the dii-ik S20 to send in its siginil, in order thnt the complete Hignnl muy be received within the auxiliary box 50. Should niiotlicr box be sending in its signiil the inechiinisin within the nuxiliury box will be held in cheek, and the buzzer constantly voinf.: until the .box i.-i iillowed to toko lie line. lt is evident thut niiy nuniber of these uiixilinry boxes uniy lie connected with every iuii.-ter-tut ion auch iis tluit represented.

lu the upper leftlnind portion of Fig. 1 is u representiition of iiiiother form of signiil .tiition, in this cnw an u )puriitus which iiiay ho iidviintngeoiisly used or a police call-box. ln this portion ot the drnwing 70 designates the ini-losing box within which is u iuipporting l'rnino Tl. wheel 72 is pivoteil in this ruine, the spring for which is not lshown but which is errnnged to be wound up und nctuuted bv n ratchet nud pawl mechanism through the medium The geur-wheel T2 is ul*- spriiiiictunted geur.

"closed which are electricall ranged. through nn intcrincdiiitc pinion which is not how-n. to dvivo ii goor-wht-cl 74 which transmits it niotion to un cscnpcmont. wliccl 75 which .is provided for thc purpose of prevcntingY too riipid l'otiition of the actuating nicclninisin. 7o und 77 iii-o Ineke ond breidt si 'nid disks conoci-lcd to rotate with gear-wieel 74. A s ring contact finger 78 coperiites with tie sinullci disk 74'. The disk 77 is rovidcd with n dcsired number of teeth or thc purpose of sending to thc central otiice the signal of this particular station. Besides the teeth corroa riding with the signal of thc. lios. thc dit 77 is providcd with teeth l, 2, :t und 4 with which contact fingers 1^, 2^, 3^, nml 4^ coperate, respectivel to elect the sending of certain calla such, or exam le as i'cpoi't call, telephone cell, am iu ance cull," and wagon call. For the purpose of selecting and controlling these several calls a switch-arm 80 is provided. This is pivoted at 8l and carries an insulated contact tingcr 82 which may, he moved onto any one of four stationary contacts 1", 2", 3, and 0 coinected with :lhs contact n rs 1^, 2^, an 4^, res iv y. The contacstetlnger 78, which coperiiet: with the disk 70, and the contact finger .82 are connected with tho line wire 106 of the aignaling circuit. The use of the disk 76 and the eentact linger 78, arranged as above described, is importent for insiirin the tranembion of thc desired signal. I s contact Inlet 89 is normally in contact with stationeentact l' which may be in the report ca l circuit, so that when the box ia operated from the outside, this call will he sent. The switch-arm B0 is preferably inside of the box where it is acceible only to a policemanoreomsother rsonhaving akeythereto. This signal wil with the parte arranged in the positions shown," be two short and three short lirealoi, thus: indicating twenty-three, the number otthiiupsrticular box. When the dial: 77 moves around until the spaces between teeth 4 8, 2 and 1 pm o time. 1^. n. dok ia iii i i mi.. tact with bmah 7B so hat a circuit will lio at this point, un these breaks in disk 77 will have no eti'ect upon the signal. Now,

when t'he conlact lin er 82 is moved over onto contact 2?.the rush flo-will he coii' nected with the signal circuit so that when tho signal disks are rotated the signal which now may indicato a telephone call will lic one long break followed by two short und three short breaks, thus: this ineanin n tele hone call from hox twentythroc. ic dis und brush 78 will close that pin't of tho slgniddisk signiil which wouh otherwise he sent in by the s aces ho' tween teeth 2, 3 und 4.011 disltv'ypassiniz. brush 2^. Similarly, en ambulance cell or n wagon call represented by two long .signal disk TT. in thc nuiiinci' nhovc dcscribed. to send in the pio|wvsignuh 'ln this siniplc ninnnci' om signnl dii-:lt muy lie unido to .send in font' oil inoi'c dill'ci'ent. signnl.-. This poliqtn signal hox is provided with iin unlocking solenoid llt). the` ni'nnltnrc or coi'c of which is provided with iin nvin til noi-- nnilly depijcsmd hy u s )ring 92. A hiver titl. pivoted inl the fronte l itt D4, is provided at its lowcr cnil with a liiteriil projection with n lshoulder 95 which normally bears agniimt the arm 91. A pin 96 projects from lever 93 and is normally disposed in the path of a finger 97 secured to the escapeinentarbor of the motor. This locking means is theretore substantially the seine as that hereinbefore described in con'nnction with the tire alarm mechanism. Ti 93 is provided with a lateral arin 98 which is provided with a shoulder at its'free end. A sprin 99 presses the shouldered arm of the arm 8 towardthe end of a pin 79 projecting from the end of handle 78 and also ie upper end of lever.

serves to hold thc shoulder 95 back against the endof arm 01. A contact finger 83 in connected with but. insulated from the operating handle 73 and is arranged to cotiperate with insulated stationary contacts 85 and 86.

Ae shown in the .rawing, the mechanismof the police call boxis locked. Whenever' the magnet is energized by a manipulation of the circuits as hereinafter described, the ann 91 will be raised and this will rclesse the lever 93, und the hitter when thc operating handle 73 has heen depresse-d. will swing on its pivotal support. to ciiiry thc in 96 out of the path o the linger 07. 'i'hc signaling niechnnisiii will now be free to o rate to trnnsinit u signal to the ccnti'iil o ce. As the operating handle 73 is icturncd to its noriiml position, the pin 70 will engage with the arin 198 to retin-n it to the position iii which it is shown in Fig. 1. .If the switch-uvm B0 has been moved for the ini'pow of sending ii spccisl signal, it will rctni'ncd to its nominl position, with coutin-t. linger S2 resting upon stationair contact l". h v the engagementof a pin 4^ on nr-whccl 7-1 with n lug 87 on the switch 'llie yeti-ni which i pnit of the iiieeent invention und in which my improve apparetos is cniplo cd, comprises two. i'incipol ci'icu)ts,lone n lvhlich, atown ii t e drawings y ig t eoi inse ciillt eaigunlng circuit, and the other which i indiana by 13 heiivier broken lines may be called the con'- trolling circuit. At the ceiiti'al stationa battery 100 is provided for the signaling circuit, and a battery 110 for thel controlling circuit. A controller 120, a regiater 13:5, ind a telephone 140 may also be provided tere.

I will'now trace the various circuits and point out the operation of the system. :flic signal circuit m'thepresent instance is a closed circuit beginning at the battery 100, through a relay 130, b wire 101 to telephone arni .141. contact iagcr 142, wires 102 and 10:1. o and through wire .t which cxtcnds to the tirst signal box, in this ease the police signal box. 'lhence by wire 10:1 the circuit extends to contact finger 152 which is in contact with arm 151 of telephone 150 within the police signal box. A. wire l10.* connects this arm with the frame aiid through the latter to the signal disks 'itt and 77, aiid through the various coittact lingers resting thereon, by the wire 1011 to wire l1, h v means o1' which the signal circuit is continued to the next box on the line, which, in this case, is the tirealarin box 10. 'llie wire 10T connects the circuit with the metallic frame 11 and coittinaes through tite latter, signal dink 20 and brush 21 to wire 10S which is connected to the wire C. By means of wire C the circuit returns to ,the central station and is coinplctcd by wire 109 which connects wire C with the battery 100.

131 und 132 are conductors which connect the relay 130 with a registerin appariittm 133 which is controlled by the ne ay 130 and operated hy a local battery 134 in the. usual manner.

When the telephone receiver 140 at the central station is lifted, the artn 141 will make contact with finger 142' lwt'ore'ln'eak-v ing contact with linger 142. '.lhua the tranennttcr 144 is thrown itito the circuit witlioitt disturbing the signal circuit. 'lhc rear end 145 of arm 141 is insulated from the rest of the arm and is arranged to be moved into contact with fingers 146 and 147 to connect one end of the telepltone receiver with the signal line. The other end of the receiver is connected through a condenser 148 with the ground at litt). 144* antl 1M designate the primary and secondary windings of an,

induction eoil. Similar parts of the telephonie apparatus are shown iii-the police aignal box which may. in the above dcacribed manner, he thrown into tite signal wire cir cuit und grounded ift 169 through n condenser 15S. 'Ihus thc two telephones are connected together through the signaling mechanism in thc hosenand tlirongli the .signal circuit without tweaking tite latter. The iiii'itii 'ciiu-iit shown for conncrting'the receivers with the ground through condensers farther. prevents disturbance of the butcome;

tcrjyv :arrcnt through the signal circuit. The Second or cont rolling circuit which may also be called the unlocking circuit is energized by a battery 110 at the central station. It is a normally closet] circuit which passes through a switch 160 and contact 161 to a high resistanccvrelay 165. Thence itl runs.

by a, wire D to the police signal box, in which it is connected bv wire 111 with convvtact: plate 84. 'This p atc is .connected by vbrush 823 with plate 85,and a wire 112 con-.

controller 120, wire 12:?,` linger 123, wheel' 124. finger 125, andwirc 116 to the battery.

,Vhen' the mechanism at u station i8 unrated to transt'nit a signal tocentral otiice, the various mechanisms will he con trolletl bv a cnt ubination of the circuits which l have above described. Before the box has been set for operation the releasing solenoid 30 is entirely cut, oli' from the rest of the system, as one of its terminals is connectcd with a dead contact 'ilate 87` and ita other teriuinal is connectet with another dead contact plate 214 and with the ground by conductor V11i'. When thc box is set for operation, the switch-arm -10 is moved to the left so that the tingcr lt ia moved otl from stationary contact it!) and into position to bridge contacts 38 and. 37. At. t ie. saine time stationary contact 3'1 is connected by contact blade 33 with stationary contact :15 which is connected with the wirt` 108 of the si 'nal ciiruitt. Thus the wires -113 vand 1'),

w iieh connected this box with thc'station litvanti it. are disconnected und a circuit. in formed of arts of tite igual circuit and thc control ing circuit which includes the ich-using solenoid 80 ofv the that tire alarm station. This circuit. froin hattery cxtends through switch 100 and its contact 102, wires'118, 109, t), 108, contacts 114 and 85 which are bridged by contact 33, to and through .nuignet 110, vcontacta 37 and 88, which are brid `d by contact 36, wires F and-115,1hroug i controller 120, anti by wire '116 back to the battery.

The switch 160 in'providetl ao that it a break should occur in the ai nal line, the ponton in charge of the centralzoliice niayby moving this l:twitch into the position indicated by dotted lines, unlock an box` or boxen beyond the break which may av been pulled` so that the latter will notl beeneatly end in ita igual aiv auch time as t ie break-is remitted which would obviously be too lateto of any use. .The break in the signal line would be 'indicated by the iioI relay 130 and thc register 133 and if any hor has been pulled on the line since the lncak occumad, this fact will be shown by the urination of thc controller 120 as soon as switch 100 ia thrown over.

lhc 'lenoid .'10 and the magnet 121 in the controller at'the central atation are arranged to act almultamaiualy, ao that. the mlclmid 30 will relcaee the algnalin mechauiem of the tiret tire alarm box an at the mme tune the magnet 121 will came the coutrollcr to he actuated to break the controlling circuit. 'lhia iu uccompliahed by the rotation of the dial: 124 b come untuble ucana which. when rctcur'et by the ma net .1 und its amiciutcd parts. will nalte ralf u revolution. thereby carrying lug 126 away from finger 123 an bringi it into the positiou .-hown in dotted linea in which-it ia in eontuct with linger 12T. und cnrrying lug 121i away from iiugrr 12? and into contact with linger 129. 'lhia will councct thc controller 1:20 and the rcgiater 125:1 together.

'l`hc rcsiotam'c of relay 16.'. in the control ling circuit is ao great. that the controller muguet ltl'will not actuate ite associated parte until the mntrolliug circuit beyond :my atatiou ia broken, time cutting the relay 106 dint ofthe circuit. 'lhia relay 105 would alao gire notice ct any break in the line through it-i hack contacta which are not shown in the dran-ingu but ia well known in the art.

After the aignal fromy a given station haa been ent in over the that or aignali circuit. the controlling circuit ia automatically restored and the controller 120 at the cmtral tation brought hack to ita normal condition. This reault is attained by the following circuit and arrangement of parte. Beginning at a local battery 185 Vthe circuit goce throu l wire 1311. arm 187, contact 188, wire lllll. t trough magnet lJ1.to linger 197, which. of cournc. rnuuot cioe' the circuit hcforc thc lug 120 wgietcra it: thcn `bv tin -r 1211 and wire 180'* hack to battery 131i. Wifilc thc rcgiatcr 1:13 is inventing magnet 183* keeps the arm 137 away from contact 138. thun keeping the above local circuit open until the register hea completed ita operation. Aa aoou an the above local circuit ia cloaed through magnet 121 the controller will he raleaacd thereby and will make an- -uthcr hal! revolution. thua returning the parta to their originnl positions and restormg thc controlling circuit throughout' the loymtcm.

'Il'lw mcchuuiem of the recorder 133 in well known und, as mund, in provided with an ceca|asnwut doi-icc or other retarder which prot-cute thcl closing of urm 137 against contact 1218 until the register mechanism has come to rest.

ln Fig. 2 the emential parte of the lice of its arm 174, pushes thc com of rele ns station 1. The essential parte of tire alarm box signal 43 are shown as station 3. Intermediate these two stations ie cnothor tire alurm signal box, signal 34,.

'any box is moved to energize ite releasing magnet, auch movement at puce cute ott the eontrollin circuit or releaamgcurrcnt from all succcei ing signal boxer on the line, and the controller at the eentra'l gtotion also o ns the circuit of the controlling line unti the signal ia received und the recorder a in comes to reet. Then, if one or more o the other boxes ou a liuc have lieen pulled or set for operation, the one of these which ia nearest the central station will take the signal circuit and eend in ita aignal. It in, therefore, poaaible to connect au unlimited number of boxes on one hna and they will he abaolutely non-interfering. For example, it there were one hundred igual boxea on one line and all were pulled at exactly the lame time, the .one neareat the central station would eend m ita signal and the other would remain locked until the ret. had completed ite operation. The next nearest box to central .tation would then take the line and eend in ita tlc. It, during the sendi of a aignal one of the boxes another x nearer central atation diould be pulled tbia would not. interfere with the signal w uch waa being aant, but after the completloncf auch the latter'aigual box would take the 'ne and aend in ita ai al followed in turn by the other aignal xee which had been let for operation.

' Referring again'to Fig. l, 170 deaigna a teating switch within box'lO which, when morcd to thc left. counceta a bell 171 lu parallel with that portion ot the aignal oircuit which includes tlm ugual diak Il, aud ahunta the unlocking circuit part the relcate ing aolcnoid :10. lhcaigual ctrcut may then he released by manually raining the arm 32. 'lhe aignal actuating mechanism may thua he teated and ita ai nal uudihly beard at the hell 171 without a ecting thc other apparatua in the aignal circuit.

|72 deaignatea a faunewlnit similar teetiug witch within tha pollen touting box 70.

'lhia switch mnmaeta a bcll 173 into the signal liuc and nl the sumo time,-hy mean! "fhg magnet 110. upward ao that. the signal mech uuism is set into operai ion. lt may he leen that thc" movement of thc twitch 172 will at the naine time short-circuit tlm connection! of the controlling or unlocking circuit within the ai al hee box.

What cla m ia.-

telA

signal box which haa the eignal are wn i 1. In a aigna1 eyatam, the combination l gized by the connection ot' one of said circuits with tlu` other for ell'ectiniz the relcasc of said locking rdevice and the operation of tho si tial transmitting mechanism.

il. n a signaling system. the combination with a series ol' signal'transmitting mechanisms. and a locking device for each. of nv signal circuit including. the transmitting mechanism. a receiver controlleil by said circuit, n second circuit for said locking devices'. an electrical bridge connection, lietwecn the signal circuit and the second circuit, means for utilizing parts of said signal and unlocking circuits to actuiite the locking dev icca.v

and nit-ana for holding the unlocking circuit open nlhilc om` of aid transmitting-nicchamania ia transmitting :isigual through the signal circuit.

.-l. 1n a signaling avntent. the coiuhimition with a sci-ics of signal transmitting mcclianiama. locking devices for 'cach. and a rc ceiring mechanism. of a signal circuit iucluding said igual train-niittiiu;r mcchnninna and a central otlicc liattcry. a relay for the receiver also included in said circuit. a second or unlocking circuit for the locking devices, a resistance device and a battery included in :mid second circuit and a liridizeV circuit between the liteit-mentioned circuit and'aaid second circuit. at. n point lieta-een the battery and the resistance device in the second circuit.

. In a signaling aystcai, the combination l with a series of signal transmitting mechacluding nisms. a lockin device for cach. and receiving mechanism. of a igual circuit inthe'transmittiuz nicchaniiunii. a und circuit normally shouting the lockiiu.r devoca, a'liattery in each circuit. means for including the locking devices iii arti-i of both circuits for operating tha locking tlcvioea to unlock thc ti-ausnntting mechanism, means for releasing ont` of said transmitting mechanisms at a time and ine-ans' for opening said second circuit during the operation of the released transmitting mechanism.

tl. la. a attitudini: nyritcui. the combination with a cries o( strmal transuilttiiuz inecluiniama and a centra ollice receiver or register. of a igual-circuit normally including #aid signaling mechanisms, a rela)l m said circuit.v

cannot controlling a local circuit including the receiver or register. n locking dcvico for each transmitting mechanism, u magnet for oper ating; each locking device, a second circuit includ-lim( atliattcry at the central ofllco and normally ahunlinir the locking inaneta. a switch at cach signal station for shi ting the said second circuit through tho lock magnet and a portion of the signal circuit, a resistance device included i-n said second circuit and a liridgc circuit connecting the signal circuit and said second circuit. at a int. between thc battery and resistance Nico in tlie second circuit.

Vi'. ln a signaling.1 system. the combination with a serie of lanual stations and a central otiicc. of signaling mechanism at each atat ion. a lock device for eachsiguali mechanisni. actuatingr means for each loc` device, a rcceivcrat tht-"central oice, a si tialV circuit including;i said signaling mec aniams and conlrollin.' thc receiver. a aecond circuit passing tirough said stations, a controller in said Second circuit. means for 00nnecting said second circuit. with the sifnal circuit and the actuating means of the oclt devices.

8.. In n signalingnystem. the combination with a eci-ica ol stations cach having a eifnaliiux nnwlianianna locking device normal y locking the signaling! mechanism, and actuating means for thc ock devictna ai Al oircuit including` said a' ating meganhia and a battery. a secon `circuit including a Iiattcry and extending through said rit-ations, means for shifting said second circuit'.

'lll

through thc actuating ineana of thclock de- 'l vices and a controller in said second circuit.

t. In a signaling system. the combination with a series of signaling mechanisme. each havin a lock device and actuati means there or. of a aiizniil circuit. inclu i tha signal mechanisms. a normally cl In'- locking circuit connected with said signaling mechanisms, a resistance device in Paid unlocking circuit. and meana for short-circuit ing the insistance device-at any ot the aigc naling mechanisms.

10. in a signaling s vateui. the combination with n series of aiimal stations and a central oliice, ot signaling mechanism at each station. a lockv device -for cach aiiznali mechanica. actuating ii'ieana for each lt. device, a receiver at. tho central omen, a aigvn'al circuit. including aaid signaling n'ieclianisnia and controlling the receiver, a. second circuit pantin through aaid stations. a oontroller in aait second circuit, means for com,

net-ting said aeoond circuit with the aifnal circuit and the actuating means of the ook devices. and a bridge connecting:` aaid aignal ciicuit and-'said aoooud circuit at. the central' olllcc.

ll. ln a signaling a ein, the combination with a series o! aigna g` mechanisms, each l A of aaid eignaling mechanisms,

i the having a lock device and actuating ineens for laid lock device, of u sigiuil circuit iucludin the signaling mcclninisnis, a second norma ly 'closed circuit, a resi.-tance device and a controllcr in lmid second circuit. u bridge circuit for short-circuiting uid rciiiiitanoe device. und nieiina for connecting u portion of the nigiuil circuit with Ilie ein ond circuit und the actuiiting ineiine of the lock devices.

la'. ln ii signaling systeiii,tlie coinbiniition with u i-cries of stations und u eeutrnl oice, of ii aiguiding iuechniiiiini ut eiiclftiuion, u rcccii'cr ut thc reutriil ollicc. u iiigniil circuit including iiiiid igual nicclnuiiiunw. u lock dc .rice lor each signal nicchiuiiuui. iictiuitiug iuciinsfor cach lock device, n second circuit including the central oicc und euch of sind stations, u rcsictunce device in sind central ollice, u bridge iit tlie central otlicc connecting aid circuits. a iceiistiiucc device in said uecond circuit at one iiide of iuiid bridge, incendi at each station for connecting purta of tbe ai nal circuit and second circuit in Series wit i each other and with the actuating ineaini of the lock deviws, and a controller in aaid second circuit for opening tbe accoud circuit when the lock dcvieea are operuted.

tt. ln a aigualiug ayatein, thel combination with twoeircuitinea'cli normally independent of the other, eignaliug devices included in one of aaid cil-cuite, a lock device for euch actuating meane for eacli locli vice, means for iii cluding rtione of aaid cireuite in series with ea other and the actuating ineeiui of tlin lock devioee, and ineane for opening one of ua'id Brat-mentioned circuits and permitting the tranamiaaiion of u aigue! over the other.

14. lna signaling avateni. the combination with two normally independent circuits of signaling inecliaiuanui iiicliuhal in tlie tiret circuit, a buttery iii eacli circuit. ii resistance and an electromagnetic circuit bieakcr baving a,magnet of relativel low iesiiitiuice, in the second circuit, a bri ge connecting said circuite between the resistance und battery in the neeond circuit, lock devices for the aignaling uiecbaniiuuu, uetuiiting lucana for lock devices, and inaanii lor -nioinentiirily including parte of both ot seid circuit in aerien with thc actuating nii-una of the lock ievicea.

l5. ln u aiginiling s viitcni, the oonibiuution with two normally iudc|wndcnt circuits, of aignalin uiecluiniiune in the tirait of uuid circuits. u ock device for euch signulin mecha-I nisin, uctiniting uiciuiy for euch loc device, ineiuia forincludingportiouao! liotlicircnits in cries with cach other und the actuating menus of the lock deviccri, u circuit. breaker for o ieiiing the sccoml of said tiret-nientioi circuits when a lock device has been! operated and permitting thc triiiismisson of :i signal over the first circuit. und incuria for uutouuitieally lcloning the circuit breaker at tlie conclusion of n sigiuil.

lli. In u signaling system. the combination with two uoriniilly inde|aiideiit circuits, of signaling inwhnuiem in the first ofiuiid circuitu. lock devices for mid i nuling iueelianisms. nctuuting means for t ie lock devices, a battery. u renie-tance device and n muguet of relatively lou resistance in tlic second eircuit. n nornuillv closed circuit brenlter in the second circuit controlled by until nun:- iiet, u bridge connecting eiiid'circintela'twceii the reeii-iiuicc device und lia tery o( the acc ond circuit. nicuini for including thc uctiuiting ineiins of u lock device in series with portions of euch of snid circuits. sliuntii the resistance device in the second circuit und permitting the operation of the circuit brenkcr to open the second circuit, and electriciil devicca for automatically reatorin the circuit breaker to cloni the second circuit at the coneluiion of a iiigniil.

1T. In a signaling system, thc combination with two normally independent circuits, of signaling devices iucliu ed in tlic tiriit o( aaideireiitta, lock devices fnv the signaling deviceii, a relay ubio included in said-Bret circuit, a receiver mintrolted by said relay, a circuit closer controlled by iuiiil receiver, a battery, a reaietanee device, und a magnet of relatively low resistance included in the aecond circuit, a normall 'closed circuit breaker included iiatlie eeeoni circuit. a brid ennnecting eaid circuits between the reeiatanee device and battery in the aeeend circuit nieane for including the actuating ineens of tbe lock deviceeiii euries with botti of eaid'eircuite. and a loea circuit ilcludi a battery, the circuit cloeer non trolleldby the receiver and the magnet trolling the circuit breaker on the aeeoaid circuit for eaid circuit breaker.

1B. In a aigiialing eyeteiu, the

with two normally inde ndent eireuita, a aignal traiieiiii iiiem and a battery included in tiret of aeid eirciittana battery and a reeiataiieedeviee included in lthe second circuit, aJwiteli'in the aeeoaid circuit between tiie reeidauee device and,liat tary. a bridge oounediag aald awiteii with tbe tiret circuit, a lock device furthe signal tranainitting ineclianiian, actuating naanii for the lock devioae connected, with tbe aecond circuit. a ground connection for raid aecond 'circuit adjacent to the actuating means of said lock device, and a und conncction for tlio switch when tie latter is opened to eut out the reaiatiince device and open the circuit ofthe bridge wire.

It). ln u signaling iiyatcui, the combination .witli a ignal trununiitting Ipecliamam, an electrically o icratcd lock device therefor, a circuit for t e electrically operated meana 'iio yof the lock device, a circuit for the transmitting mechanism, a testing bell, and a. ninninil .switch consti'iiiftcd to incclninically opcrl uti' the lock to ielcasc the transmitting mechanism and short-circuit thc circuit. off thc o ici'ating means of thc lock device and I include thc test licll iii thc circuit of the signal transmitting mechanism.

Q0. In a signaling system, the eoiiiliination of a signal transmitting apparatus, an electrically controlled lockin device therefor, of a central ollice contro ici' comprising n normally closed circuit closer, means for in cludiiig said circuitcloser `in circuit with the controlling means of the lock device, and

electrically actuated means in saidcentral otlice controller for opening said circuit closer, and automatically actuated means for restoring the circuit closer of the controller.

2l. In 'a signaling system, the combination with 'a si al circuit;` .signal transmitting .means an an electrically actuated locking means therefor anda-circuit for said lockingmeans, of a central oce controller for ze controllin the circuit of the electrically actuated loc ing means, a re 'ster at the central oce for receivi t e signal of the transmitting means an devices controlled by the register for'msintaining the Vcircuit'.v

80 including the controller andelectricallg'e tuated means open while a si al ia ing mooi-'ded by thc register and en automaticalglg causing the saidcircuits to be closed.

' In'ii signalingii stein, the combination ab of a series of signa transmittiii mechanisms, each comprising a si l d' havi a series of teeth, and ineensv orrotat sai disk, a series of lingers co rating'wi the teeth of said disk, a sii-ite and a loc 40 device, with u si ial circuit including siii transmitting nicc iaiiiiuns, and iin unlokin circuit for etlecting the releasing of sais lockiii devices, said switch being arran to inc udc any one of siiid lingers in the ingnal circuit.

23. In a signaling system, the coinliiuatioii of a serieaotiiigniil traniuulttingmechanisms, each comprising a signal disk havini a series .of teeth. a motor for rotating sai disk, a series of lin .rs coperating with the teeth of the' signa disk, ii sii-itch associated with said fingers a device on the motor for rei turiiin imi sivitcli to its noi-nial position, and a ocking device. with a signal receiving M mechanism, n aii'nal circuit including the ti'ansniittlngnicn ianiaiii .and i'niiti'nllin'irtliii signal iecciviugir mechant-mma second circuit for said locking dci-iccs, and means co. operating with hotli of said circuits fui' eftlO :letting the release of said loi-hint;i 'ilcvici-s and the u1u-ration ot the signal mechanisms. i 24. In ii signal system the coiiiliiiiatioii of ii signaltransmitting mechanism, a motor therefor, a lock device for the motor, sind an clcctrorespousive device for controlling thc. lock device; a signal circuit including the tiaiisniitting iuiazhauisin, and aii unlock- .ing circuit; a switch for connccting one of said circuits willi the other tu energize the clectroicsponsive device, means for operating said switch to connect' said circuits to i thereby release the motor and the transmitting mechanism, iuid means actuated by the motor for autoauitically returning said switch.

25. In a signaling s isteiii, the combination of a series of signa Atransmitting mechanisms, each comprising a signal disk, s motor, a lock device for the motor, an electrovresponsive device `for controlling said device, a switch in the circuit of electrores naive device, means for moving said switch to close the circii'it of the electrotesponsive device a shoulder on the arm of saidswitch, an an arm moved by the motor to engage said shoulder to thereby retum the switch; with a signal receiving mechanism, a signal circuit includi the' transmitting mechanisms and contro g the ai al receiving mechanism, a second circuit or said electrores onsive devi -an'd means coperating wi both of aai circuits for etectin the release of said locklng devices and e operation o! the transmitting mechanisms.

26. In s signaling system, the combination with a series of transmit mechanisms and locking means therefor, o a circult, and a second circuit for con Y the l -mcans, a switch for each transmit mechanism and mesu on nid testing swi cli for mechanically operating the locking means to roles thats-annuitting mechanism and for the second circuit.

27. In a signaling system, the combination with a series of ai nal tran-ni ziiiinia, n iiigini rainnin in i iiicc ian for `the traiiiiiiiittiug inechsnisins,sn unlocking elcctromagnct for each of the'trsnsmittin mechanisms, ii local ground ciraiit for eaci of said magnets, an unl circuit, and means for momentarily ene but one of said elcctroningncts at a time other.

Ia testimony whereof I. have signed my naine to this specification in the presence of two subscribing witnesses.

FRANK B. WOOD.' Witnesses:

Winnie. li. Gratins, Bimini' W. Maiisnau..

lg the connection of one of said circuits wi the lecl:V ec

mecha-4 iis 

